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, % ✓ (�n c J//G <br /> A. Calculate Ctenn Sand Lift: 3 feet minus Depth to Limiting Layer (1.C) = Clean Sand Lift (1 ft minimum) <br /> 3.0 ft - 1.5 ft= 1.5 ft <br /> B. Catculate Upslope Height: Clean Sand Lift(4.A) +media depth (1 ft.) +cover (1 ft.)= Upslope Height <br /> _ 1.5 ft+ 1.0 ft+ 1.0 ft = 3.5 ft <br /> Select Upstope Berm Multiplier <br /> �' (based on land slope): 3.23 (figure D-34) <br /> D. Calculate Upslope Berm Width: Multiplier (4.C)X Upslope Mo�nd Height (4.6) = Upslope Berm Width <br /> 3.23 x 3.5 ft= 11.0 ft <br /> E. Catculate Drop in Elevation Under Media:Media Width (2.8) X Land Slope(1.E) : 100=Drop (ft) <br /> 10.0 x 6.0 %= 100= 0.6 ft <br /> F. Calculate Downslope Mound Height: Upstope Height (4.B)+Drop in E(evntion (4.E)= Downslope Height <br /> 3.5 ft+ 0.6 ft= 4.1 ft <br /> Select Qownslope Berm Mu(tip(ier <br /> G' (based on tand slope): 5.26 (figure D-34) <br /> H. Catculate Downslope Berm �dth:Muttiplier (4.G)X Downslope Height(4.F) =Downs(ope Berm Width <br /> 5.26 x 4.1 ft= 21.0 ft <br /> I. Calculate Minimum Berm to Cover Absorption Area: Downstope Absorption �dth (3.B or 3.C)+4 ft. =ft <br /> 5.4 ft+ 4 ft= 9.4 ft <br /> J. Design Downslope Berm =greater of 4H and 41: 21.� ft <br /> K. Select Endslope Berm Multip(ier: 3.00 (usualty 3.0 or 4.0) <br /> L. Calculate Ends(ope Berm {4.K)X Downs(ope Mound Height (4.F) =Endslope Berm Width <br /> - 3.40 x 4.1 ft= 13.0 ft <br /> M. Calculate Mound Width: Ups(ope Berm Width(4.D)+Media Width (2.6) + porvrn(ope Berm Width (4.J)=ft <br /> 11.0 ft+ 10.0 ft+ 21.0 ft= 42.0 ft <br /> N. Calcutate Mound Length: Endstope Berm Width (4.L)+Medio Length (2.C) +Endslope Berm Width (4.L) =ft <br /> 13.0 ft+ 63.0 ft+ 13.0 ft= 89.0 ft <br /> D-34:Sbpe RtulNplier Table <br /> Land Slope% 0 1 2 3 4 5 6 7 8 9 10 ii 12 13 td 15 16 17 IS 19 20 21 22 23 24 25 <br /> �PSlO� 3:1 3.00 2.91 2.83 2.75 2.68 2.61 2.5�7 2.A8 2.-12 2.36 2.31 2.Z6 2.21 2.17 2.13 2.C9 1.06 2.03 2.00 1.97 1.95 1.93 1.41 1.89 1.87 1.85 <br /> Bernl Ratio 4:1 a.OD 3.85 3.70 3.57 3.45 3.33 3.23 3.12 3.03 2.44 2.86 2.78 2.70 Z.62 2.55 2.a8 2.J1 Z.35 2.19 Z.23 2.18 2.13 2.08 Z.03 t.98 t.93 <br /> Land Slope°Jo 0 1 2 3 4 5 b 7 a 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 <br /> DOV/f1SlOp2 3:1 3.00 3.09 3.19 3.3Q 3.J1 3.53 3.66 3.80 3.95 4J1 �{19 d.48 d.69 �t.95 5.24 5.55 5.88 6.2J 6.63 7.DA 7.-t7 7.93 8.42 8.93 9.d6 1�.02 <br /> Bernt Rdtio 4:1 4.OU 4.17 4.35 A.5A 4.76 5.Q0 5.26 5.56 5.88 6.25 6.67 7.14 7.69 8.29 8.92 9.57 10.24 10.9d 11.67 12.42 13.19 13.99 +4.82 15.67 16.5d t7.da <br /> 5. ORGANIC LOADING: (if pretreatment is being used) <br /> A. Organic Loading = Design Flow X Estimated BOD in mg/L in the effluent X 8.35: 1,000,000 (See Table III) <br /> gpd X mg/L X 8.35 = 1,000,000 = lbs BOD/day <br /> B. Calculate System Organic Loadi : (bs. BOD (5.A) :Media Area (2.A) =lbs/da /ftZ <br /> lbs/day -�- ftZ = lbs/day/ftz <br /> Table III (7083.4030) <br /> BOD Treatment BOD (mg/L) <br /> Levet A 15 <br /> Levet B 25 <br /> LevelC 125 <br /> 6. MOUND DIMENSIONS <br /> �1C J <br />